Howdy owdy clothy peoples

I'm leaving for a holiday to Hervey Bay on thursday. I'm wanting to do cloth while I'm gone (hopefully will be able to use my SIL's washing machine - if not will go to laundromat)

Wondering since I have such a big lot of nappies to take (with 2 in cloth) if I could put my stash in one of those large space bags (you know, the ones you vaccuum all the air out of so they go really skinny) and suck all the air out so it lays flat in the boot? (Remebering that we also have to take the stroller, two mattresses, maybe the portacot, etc with us cos BIL and SIL have NOTHING at their house we can use)

Do you think this would damage the nappies or have I come up with an excellent space saving idea?